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Linux 4.16.11
[linux/fpc-iii.git] / drivers / video / fbdev / cg14.c
blob8de88b129b62244c11e44092687020c2a7b0257f
1 /* cg14.c: CGFOURTEEN frame buffer driver
2 *
3 * Copyright (C) 2003, 2006 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1996,1998 Jakub Jelinek (jj@ultra.linux.cz)
5 * Copyright (C) 1995 Miguel de Icaza (miguel@nuclecu.unam.mx)
6 *
7 * Driver layout based loosely on tgafb.c, see that file for credits.
8 */
9
10 #include <linux/module.h>
11 #include <linux/kernel.h>
12 #include <linux/errno.h>
13 #include <linux/string.h>
14 #include <linux/delay.h>
15 #include <linux/init.h>
16 #include <linux/fb.h>
17 #include <linux/mm.h>
18 #include <linux/uaccess.h>
19 #include <linux/of_device.h>
20
21 #include <asm/io.h>
22 #include <asm/fbio.h>
23
24 #include "sbuslib.h"
25
26 /*
27 * Local functions.
28 */
29
30 static int cg14_setcolreg(unsigned, unsigned, unsigned, unsigned,
31 unsigned, struct fb_info *);
32
33 static int cg14_mmap(struct fb_info *, struct vm_area_struct *);
34 static int cg14_ioctl(struct fb_info *, unsigned int, unsigned long);
35 static int cg14_pan_display(struct fb_var_screeninfo *, struct fb_info *);
36
37 /*
38 * Frame buffer operations
39 */
40
41 static struct fb_ops cg14_ops = {
42 .owner = THIS_MODULE,
43 .fb_setcolreg = cg14_setcolreg,
44 .fb_pan_display = cg14_pan_display,
45 .fb_fillrect = cfb_fillrect,
46 .fb_copyarea = cfb_copyarea,
47 .fb_imageblit = cfb_imageblit,
48 .fb_mmap = cg14_mmap,
49 .fb_ioctl = cg14_ioctl,
50 #ifdef CONFIG_COMPAT
51 .fb_compat_ioctl = sbusfb_compat_ioctl,
52 #endif
53 };
54
55 #define CG14_MCR_INTENABLE_SHIFT 7
56 #define CG14_MCR_INTENABLE_MASK 0x80
57 #define CG14_MCR_VIDENABLE_SHIFT 6
58 #define CG14_MCR_VIDENABLE_MASK 0x40
59 #define CG14_MCR_PIXMODE_SHIFT 4
60 #define CG14_MCR_PIXMODE_MASK 0x30
61 #define CG14_MCR_TMR_SHIFT 2
62 #define CG14_MCR_TMR_MASK 0x0c
63 #define CG14_MCR_TMENABLE_SHIFT 1
64 #define CG14_MCR_TMENABLE_MASK 0x02
65 #define CG14_MCR_RESET_SHIFT 0
66 #define CG14_MCR_RESET_MASK 0x01
67 #define CG14_REV_REVISION_SHIFT 4
68 #define CG14_REV_REVISION_MASK 0xf0
69 #define CG14_REV_IMPL_SHIFT 0
70 #define CG14_REV_IMPL_MASK 0x0f
71 #define CG14_VBR_FRAMEBASE_SHIFT 12
72 #define CG14_VBR_FRAMEBASE_MASK 0x00fff000
73 #define CG14_VMCR1_SETUP_SHIFT 0
74 #define CG14_VMCR1_SETUP_MASK 0x000001ff
75 #define CG14_VMCR1_VCONFIG_SHIFT 9
76 #define CG14_VMCR1_VCONFIG_MASK 0x00000e00
77 #define CG14_VMCR2_REFRESH_SHIFT 0
78 #define CG14_VMCR2_REFRESH_MASK 0x00000001
79 #define CG14_VMCR2_TESTROWCNT_SHIFT 1
80 #define CG14_VMCR2_TESTROWCNT_MASK 0x00000002
81 #define CG14_VMCR2_FBCONFIG_SHIFT 2
82 #define CG14_VMCR2_FBCONFIG_MASK 0x0000000c
83 #define CG14_VCR_REFRESHREQ_SHIFT 0
84 #define CG14_VCR_REFRESHREQ_MASK 0x000003ff
85 #define CG14_VCR1_REFRESHENA_SHIFT 10
86 #define CG14_VCR1_REFRESHENA_MASK 0x00000400
87 #define CG14_VCA_CAD_SHIFT 0
88 #define CG14_VCA_CAD_MASK 0x000003ff
89 #define CG14_VCA_VERS_SHIFT 10
90 #define CG14_VCA_VERS_MASK 0x00000c00
91 #define CG14_VCA_RAMSPEED_SHIFT 12
92 #define CG14_VCA_RAMSPEED_MASK 0x00001000
93 #define CG14_VCA_8MB_SHIFT 13
94 #define CG14_VCA_8MB_MASK 0x00002000
95
96 #define CG14_MCR_PIXMODE_8 0
97 #define CG14_MCR_PIXMODE_16 2
98 #define CG14_MCR_PIXMODE_32 3
99
100 struct cg14_regs{
101 u8 mcr; /* Master Control Reg */
102 u8 ppr; /* Packed Pixel Reg */
103 u8 tms[2]; /* Test Mode Status Regs */
104 u8 msr; /* Master Status Reg */
105 u8 fsr; /* Fault Status Reg */
106 u8 rev; /* Revision & Impl */
107 u8 ccr; /* Clock Control Reg */
108 u32 tmr; /* Test Mode Read Back */
109 u8 mod; /* Monitor Operation Data Reg */
110 u8 acr; /* Aux Control */
111 u8 xxx0[6];
112 u16 hct; /* Hor Counter */
113 u16 vct; /* Vert Counter */
114 u16 hbs; /* Hor Blank Start */
115 u16 hbc; /* Hor Blank Clear */
116 u16 hss; /* Hor Sync Start */
117 u16 hsc; /* Hor Sync Clear */
118 u16 csc; /* Composite Sync Clear */
119 u16 vbs; /* Vert Blank Start */
120 u16 vbc; /* Vert Blank Clear */
121 u16 vss; /* Vert Sync Start */
122 u16 vsc; /* Vert Sync Clear */
123 u16 xcs;
124 u16 xcc;
125 u16 fsa; /* Fault Status Address */
126 u16 adr; /* Address Registers */
127 u8 xxx1[0xce];
128 u8 pcg[0x100]; /* Pixel Clock Generator */
129 u32 vbr; /* Frame Base Row */
130 u32 vmcr; /* VBC Master Control */
131 u32 vcr; /* VBC refresh */
132 u32 vca; /* VBC Config */
133 };
134
135 #define CG14_CCR_ENABLE 0x04
136 #define CG14_CCR_SELECT 0x02 /* HW/Full screen */
137
138 struct cg14_cursor {
139 u32 cpl0[32]; /* Enable plane 0 */
140 u32 cpl1[32]; /* Color selection plane */
141 u8 ccr; /* Cursor Control Reg */
142 u8 xxx0[3];
143 u16 cursx; /* Cursor x,y position */
144 u16 cursy; /* Cursor x,y position */
145 u32 color0;
146 u32 color1;
147 u32 xxx1[0x1bc];
148 u32 cpl0i[32]; /* Enable plane 0 autoinc */
149 u32 cpl1i[32]; /* Color selection autoinc */
150 };
151
152 struct cg14_dac {
153 u8 addr; /* Address Register */
154 u8 xxx0[255];
155 u8 glut; /* Gamma table */
156 u8 xxx1[255];
157 u8 select; /* Register Select */
158 u8 xxx2[255];
159 u8 mode; /* Mode Register */
160 };
161
162 struct cg14_xlut{
163 u8 x_xlut [256];
164 u8 x_xlutd [256];
165 u8 xxx0[0x600];
166 u8 x_xlut_inc [256];
167 u8 x_xlutd_inc [256];
168 };
169
170 /* Color look up table (clut) */
171 /* Each one of these arrays hold the color lookup table (for 256
172 * colors) for each MDI page (I assume then there should be 4 MDI
173 * pages, I still wonder what they are. I have seen NeXTStep split
174 * the screen in four parts, while operating in 24 bits mode. Each
175 * integer holds 4 values: alpha value (transparency channel, thanks
176 * go to John Stone (johns@umr.edu) from OpenBSD), red, green and blue
177 *
178 * I currently use the clut instead of the Xlut
179 */
180 struct cg14_clut {
181 u32 c_clut [256];
182 u32 c_clutd [256]; /* i wonder what the 'd' is for */
183 u32 c_clut_inc [256];
184 u32 c_clutd_inc [256];
185 };
186
187 #define CG14_MMAP_ENTRIES 16
188
189 struct cg14_par {
190 spinlock_t lock;
191 struct cg14_regs __iomem *regs;
192 struct cg14_clut __iomem *clut;
193 struct cg14_cursor __iomem *cursor;
194
195 u32 flags;
196 #define CG14_FLAG_BLANKED 0x00000001
197
198 unsigned long iospace;
199
200 struct sbus_mmap_map mmap_map[CG14_MMAP_ENTRIES];
201
202 int mode;
203 int ramsize;
204 };
205
206 static void __cg14_reset(struct cg14_par *par)
207 {
208 struct cg14_regs __iomem *regs = par->regs;
209 u8 val;
210
211 val = sbus_readb(&regs->mcr);
212 val &= ~(CG14_MCR_PIXMODE_MASK);
213 sbus_writeb(val, &regs->mcr);
214 }
215
216 static int cg14_pan_display(struct fb_var_screeninfo *var, struct fb_info *info)
217 {
218 struct cg14_par *par = (struct cg14_par *) info->par;
219 unsigned long flags;
220
221 /* We just use this to catch switches out of
222 * graphics mode.
223 */
224 spin_lock_irqsave(&par->lock, flags);
225 __cg14_reset(par);
226 spin_unlock_irqrestore(&par->lock, flags);
227
228 if (var->xoffset || var->yoffset || var->vmode)
229 return -EINVAL;
230 return 0;
231 }
232
233 /**
234 * cg14_setcolreg - Optional function. Sets a color register.
235 * @regno: boolean, 0 copy local, 1 get_user() function
236 * @red: frame buffer colormap structure
237 * @green: The green value which can be up to 16 bits wide
238 * @blue: The blue value which can be up to 16 bits wide.
239 * @transp: If supported the alpha value which can be up to 16 bits wide.
240 * @info: frame buffer info structure
241 */
242 static int cg14_setcolreg(unsigned regno,
243 unsigned red, unsigned green, unsigned blue,
244 unsigned transp, struct fb_info *info)
245 {
246 struct cg14_par *par = (struct cg14_par *) info->par;
247 struct cg14_clut __iomem *clut = par->clut;
248 unsigned long flags;
249 u32 val;
250
251 if (regno >= 256)
252 return 1;
253
254 red >>= 8;
255 green >>= 8;
256 blue >>= 8;
257 val = (red | (green << 8) | (blue << 16));
258
259 spin_lock_irqsave(&par->lock, flags);
260 sbus_writel(val, &clut->c_clut[regno]);
261 spin_unlock_irqrestore(&par->lock, flags);
262
263 return 0;
264 }
265
266 static int cg14_mmap(struct fb_info *info, struct vm_area_struct *vma)
267 {
268 struct cg14_par *par = (struct cg14_par *) info->par;
269
270 return sbusfb_mmap_helper(par->mmap_map,
271 info->fix.smem_start, info->fix.smem_len,
272 par->iospace, vma);
273 }
274
275 static int cg14_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg)
276 {
277 struct cg14_par *par = (struct cg14_par *) info->par;
278 struct cg14_regs __iomem *regs = par->regs;
279 struct mdi_cfginfo kmdi, __user *mdii;
280 unsigned long flags;
281 int cur_mode, mode, ret = 0;
282
283 switch (cmd) {
284 case MDI_RESET:
285 spin_lock_irqsave(&par->lock, flags);
286 __cg14_reset(par);
287 spin_unlock_irqrestore(&par->lock, flags);
288 break;
289
290 case MDI_GET_CFGINFO:
291 memset(&kmdi, 0, sizeof(kmdi));
292
293 spin_lock_irqsave(&par->lock, flags);
294 kmdi.mdi_type = FBTYPE_MDICOLOR;
295 kmdi.mdi_height = info->var.yres;
296 kmdi.mdi_width = info->var.xres;
297 kmdi.mdi_mode = par->mode;
298 kmdi.mdi_pixfreq = 72; /* FIXME */
299 kmdi.mdi_size = par->ramsize;
300 spin_unlock_irqrestore(&par->lock, flags);
301
302 mdii = (struct mdi_cfginfo __user *) arg;
303 if (copy_to_user(mdii, &kmdi, sizeof(kmdi)))
304 ret = -EFAULT;
305 break;
306
307 case MDI_SET_PIXELMODE:
308 if (get_user(mode, (int __user *) arg)) {
309 ret = -EFAULT;
310 break;
311 }
312
313 spin_lock_irqsave(&par->lock, flags);
314 cur_mode = sbus_readb(&regs->mcr);
315 cur_mode &= ~CG14_MCR_PIXMODE_MASK;
316 switch(mode) {
317 case MDI_32_PIX:
318 cur_mode |= (CG14_MCR_PIXMODE_32 <<
319 CG14_MCR_PIXMODE_SHIFT);
320 break;
321
322 case MDI_16_PIX:
323 cur_mode |= (CG14_MCR_PIXMODE_16 <<
324 CG14_MCR_PIXMODE_SHIFT);
325 break;
326
327 case MDI_8_PIX:
328 break;
329
330 default:
331 ret = -ENOSYS;
332 break;
333 }
334 if (!ret) {
335 sbus_writeb(cur_mode, &regs->mcr);
336 par->mode = mode;
337 }
338 spin_unlock_irqrestore(&par->lock, flags);
339 break;
340
341 default:
342 ret = sbusfb_ioctl_helper(cmd, arg, info,
343 FBTYPE_MDICOLOR, 8,
344 info->fix.smem_len);
345 break;
346 }
347
348 return ret;
349 }
350
351 /*
352 * Initialisation
353 */
354
355 static void cg14_init_fix(struct fb_info *info, int linebytes,
356 struct device_node *dp)
357 {
358 const char *name = dp->name;
359
360 strlcpy(info->fix.id, name, sizeof(info->fix.id));
361
362 info->fix.type = FB_TYPE_PACKED_PIXELS;
363 info->fix.visual = FB_VISUAL_PSEUDOCOLOR;
364
365 info->fix.line_length = linebytes;
366
367 info->fix.accel = FB_ACCEL_SUN_CG14;
368 }
369
370 static struct sbus_mmap_map __cg14_mmap_map[CG14_MMAP_ENTRIES] = {
371 {
372 .voff = CG14_REGS,
373 .poff = 0x80000000,
374 .size = 0x1000
375 },
376 {
377 .voff = CG14_XLUT,
378 .poff = 0x80003000,
379 .size = 0x1000
380 },
381 {
382 .voff = CG14_CLUT1,
383 .poff = 0x80004000,
384 .size = 0x1000
385 },
386 {
387 .voff = CG14_CLUT2,
388 .poff = 0x80005000,
389 .size = 0x1000
390 },
391 {
392 .voff = CG14_CLUT3,
393 .poff = 0x80006000,
394 .size = 0x1000
395 },
396 {
397 .voff = CG3_MMAP_OFFSET - 0x7000,
398 .poff = 0x80000000,
399 .size = 0x7000
400 },
401 {
402 .voff = CG3_MMAP_OFFSET,
403 .poff = 0x00000000,
404 .size = SBUS_MMAP_FBSIZE(1)
405 },
406 {
407 .voff = MDI_CURSOR_MAP,
408 .poff = 0x80001000,
409 .size = 0x1000
410 },
411 {
412 .voff = MDI_CHUNKY_BGR_MAP,
413 .poff = 0x01000000,
414 .size = 0x400000
415 },
416 {
417 .voff = MDI_PLANAR_X16_MAP,
418 .poff = 0x02000000,
419 .size = 0x200000
420 },
421 {
422 .voff = MDI_PLANAR_C16_MAP,
423 .poff = 0x02800000,
424 .size = 0x200000
425 },
426 {
427 .voff = MDI_PLANAR_X32_MAP,
428 .poff = 0x03000000,
429 .size = 0x100000
430 },
431 {
432 .voff = MDI_PLANAR_B32_MAP,
433 .poff = 0x03400000,
434 .size = 0x100000
435 },
436 {
437 .voff = MDI_PLANAR_G32_MAP,
438 .poff = 0x03800000,
439 .size = 0x100000
440 },
441 {
442 .voff = MDI_PLANAR_R32_MAP,
443 .poff = 0x03c00000,
444 .size = 0x100000
445 },
446 { .size = 0 }
447 };
448
449 static void cg14_unmap_regs(struct platform_device *op, struct fb_info *info,
450 struct cg14_par *par)
451 {
452 if (par->regs)
453 of_iounmap(&op->resource[0],
454 par->regs, sizeof(struct cg14_regs));
455 if (par->clut)
456 of_iounmap(&op->resource[0],
457 par->clut, sizeof(struct cg14_clut));
458 if (par->cursor)
459 of_iounmap(&op->resource[0],
460 par->cursor, sizeof(struct cg14_cursor));
461 if (info->screen_base)
462 of_iounmap(&op->resource[1],
463 info->screen_base, info->fix.smem_len);
464 }
465
466 static int cg14_probe(struct platform_device *op)
467 {
468 struct device_node *dp = op->dev.of_node;
469 struct fb_info *info;
470 struct cg14_par *par;
471 int is_8mb, linebytes, i, err;
472
473 info = framebuffer_alloc(sizeof(struct cg14_par), &op->dev);
474
475 err = -ENOMEM;
476 if (!info)
477 goto out_err;
478 par = info->par;
479
480 spin_lock_init(&par->lock);
481
482 sbusfb_fill_var(&info->var, dp, 8);
483 info->var.red.length = 8;
484 info->var.green.length = 8;
485 info->var.blue.length = 8;
486
487 linebytes = of_getintprop_default(dp, "linebytes",
488 info->var.xres);
489 info->fix.smem_len = PAGE_ALIGN(linebytes * info->var.yres);
490
491 if (!strcmp(dp->parent->name, "sbus") ||
492 !strcmp(dp->parent->name, "sbi")) {
493 info->fix.smem_start = op->resource[0].start;
494 par->iospace = op->resource[0].flags & IORESOURCE_BITS;
495 } else {
496 info->fix.smem_start = op->resource[1].start;
497 par->iospace = op->resource[0].flags & IORESOURCE_BITS;
498 }
499
500 par->regs = of_ioremap(&op->resource[0], 0,
501 sizeof(struct cg14_regs), "cg14 regs");
502 par->clut = of_ioremap(&op->resource[0], CG14_CLUT1,
503 sizeof(struct cg14_clut), "cg14 clut");
504 par->cursor = of_ioremap(&op->resource[0], CG14_CURSORREGS,
505 sizeof(struct cg14_cursor), "cg14 cursor");
506
507 info->screen_base = of_ioremap(&op->resource[1], 0,
508 info->fix.smem_len, "cg14 ram");
509
510 if (!par->regs || !par->clut || !par->cursor || !info->screen_base)
511 goto out_unmap_regs;
512
513 is_8mb = (((op->resource[1].end - op->resource[1].start) + 1) ==
514 (8 * 1024 * 1024));
515
516 BUILD_BUG_ON(sizeof(par->mmap_map) != sizeof(__cg14_mmap_map));
517
518 memcpy(&par->mmap_map, &__cg14_mmap_map, sizeof(par->mmap_map));
519
520 for (i = 0; i < CG14_MMAP_ENTRIES; i++) {
521 struct sbus_mmap_map *map = &par->mmap_map[i];
522
523 if (!map->size)
524 break;
525 if (map->poff & 0x80000000)
526 map->poff = (map->poff & 0x7fffffff) +
527 (op->resource[0].start -
528 op->resource[1].start);
529 if (is_8mb &&
530 map->size >= 0x100000 &&
531 map->size <= 0x400000)
532 map->size *= 2;
533 }
534
535 par->mode = MDI_8_PIX;
536 par->ramsize = (is_8mb ? 0x800000 : 0x400000);
537
538 info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
539 info->fbops = &cg14_ops;
540
541 __cg14_reset(par);
542
543 if (fb_alloc_cmap(&info->cmap, 256, 0))
544 goto out_unmap_regs;
545
546 fb_set_cmap(&info->cmap, info);
547
548 cg14_init_fix(info, linebytes, dp);
549
550 err = register_framebuffer(info);
551 if (err < 0)
552 goto out_dealloc_cmap;
553
554 dev_set_drvdata(&op->dev, info);
555
556 printk(KERN_INFO "%pOF: cgfourteen at %lx:%lx, %dMB\n",
557 dp,
558 par->iospace, info->fix.smem_start,
559 par->ramsize >> 20);
560
561 return 0;
562
563 out_dealloc_cmap:
564 fb_dealloc_cmap(&info->cmap);
565
566 out_unmap_regs:
567 cg14_unmap_regs(op, info, par);
568 framebuffer_release(info);
569
570 out_err:
571 return err;
572 }
573
574 static int cg14_remove(struct platform_device *op)
575 {
576 struct fb_info *info = dev_get_drvdata(&op->dev);
577 struct cg14_par *par = info->par;
578
579 unregister_framebuffer(info);
580 fb_dealloc_cmap(&info->cmap);
581
582 cg14_unmap_regs(op, info, par);
583
584 framebuffer_release(info);
585
586 return 0;
587 }
588
589 static const struct of_device_id cg14_match[] = {
590 {
591 .name = "cgfourteen",
592 },
593 {},
594 };
595 MODULE_DEVICE_TABLE(of, cg14_match);
596
597 static struct platform_driver cg14_driver = {
598 .driver = {
599 .name = "cg14",
600 .of_match_table = cg14_match,
601 },
602 .probe = cg14_probe,
603 .remove = cg14_remove,
604 };
605
606 static int __init cg14_init(void)
607 {
608 if (fb_get_options("cg14fb", NULL))
609 return -ENODEV;
610
611 return platform_driver_register(&cg14_driver);
612 }
613
614 static void __exit cg14_exit(void)
615 {
616 platform_driver_unregister(&cg14_driver);
617 }
618
619 module_init(cg14_init);
620 module_exit(cg14_exit);
621
622 MODULE_DESCRIPTION("framebuffer driver for CGfourteen chipsets");
623 MODULE_AUTHOR("David S. Miller <davem@davemloft.net>");
624 MODULE_VERSION("2.0");
625 MODULE_LICENSE("GPL");
Linux with added FPC-III support